Regulator for dynamo-electric machines



(No Model.)

C. JR. VAN DEPOELE.

REGULATOR FOR DYNAMO ELECTRIC MACHINES.

No. 335,659. v Patented Febl 9, 1886.

C) C) e E. l \u| C) -x O zur x m l Q Q te. s F I Q" E N y A ,/Q

un J CFC 5 v J' R N l E g5 C :I EN,g j C? N :i im

vcnizor df. gm Zark/s JM .5e/zoe@ iliTnD STATES PATENT OFFICE,

lHARLES VAN DEPOELE, OF CHICAGO, ILLINOIS.

REGULATOR FOR DYNAMO-ELECTREC MACHINES.

SPECIFICATION forming part of Letters Patent No. 335,659, dated February9,1886.

Application filed November S, 1882. Serial No. 76,261, (Xo model.)

To (if/ZZ whom t may concer-u:

Be it known that l, CHARLES J. VAN Dn ironia), ol' Chicago, in thecounty of Cook and State of Illinois, have invented new and usefulImprovements in Dynamo-Electric Ma chines, and I do hereby declare thatthe following is a full, clear, and exact description thereof, referencebeing had to the accompanying drawings, which form a part of thisSpecification.

The nature of this invention relates to ccr tain new and usefulimprovements in the construction of dynamo-electric machines, by whichthe electro-inotive force of the machine is equalized or kept up to meetthe different requirements on the line-as, for instance, when themachine is adapted to run twenty lights in a circuit, and it isexpedient, from any cause, to extinguish at a certain timev a part ofthelights, one after another, without warning to the central station. Thedevice works automatically without attention, and the force necessary torun the lights will corfuse.

The invention consists in winding the main magnets of the machinedifferentially and in the combinations and construction of parts and ltheir operation, as more fully hereinafter described. l

Figure l is a vertical longitudinal section through the axis of myimproved dynamo. Fig. 2 shows the connection between the dynamo and thegovernor. Fig. Sshyows the connections between the dynamo, governor, anda number of lights in circuit.-

In the accompanying diawings,\vhich form apart of this speciication, A Arepresent the iron cores of the magnets, one of which is placed on eachside of the armature.

M M represent the inain magnet-conductors, and D D the differentialmagnet-conductors, both being wound in the usual way around the coresand insulated from each other, the main magnet-condnctors being woundoutside the differential-magnet conductors, as shown. The outer end ofthe main conductor is connected to the bindingpost P, the current passesfrom the outer tothe inner part of the coil or main conductor andthrough the connecting-wire B to the top collector of the armature S S,as usual in ordinary dynamos; thence the current passes from the toppart of the armature down to the lower part, C, ot

the saine through the collector and connectingwire C to theinner endofthe coil M and out at the outer end of said coil at D?, when it isconnected to the binding-post N. This is the circuit in the main coilsin the machine.

The differential current runs as follows with relation to the maincoils:The inner end, of the coil D is connected with the binding post P, whichis in electrical contact with the main coil. The current thus flows fromthe inside of the coil D to the outside terminal, b, thereof, whence itpasses by means of the connection b to the outside of the coil D at c,and out at Land then through a connection to be hereinafter described.

In Fig. 2 is shown a regulator or governor, such as is described inLetters Patent granted to me January 9, 1883, No. 270,352; hence adescription thereof is not deemed necessary here. respond to the numberof such lights in actual Sufiice-it to say, I is a binding-post, towhich a number of coils or passages, j', are connected by their lowerends or terminals. All the outer ends of these coils or passages fprotrude on top of said coils f at g, and all are insulated from eachother.

H is a copper bar, (or othersuitablc metah) edged by a platinum strip,l1, running the length of the contacts y. The bar II, when not broughtdown by the magnet M, will be forced upward by the spring S', andthereby break all communication with the contacts g, so that the amountof current passing will depend, first, on the tension of such currents,and, second, on the number of coils or passages f in or out of circuit.This is actuated by the magnet M2 upon the bar I-I. One of the terminalsof all the said coils or passages f is connected in multiple arc to thebindingpost P', communicating with the differential circuit, and thefree ends g thereof are acted upon by the contact-bar H, as explained.

Having thus described the construction of my improved dynamo, I will nowattempt to clearly indicate its operation. Let us suppose that a dynamois capable at its maximum force to run thirty lights. XVe connect theWire I to the bindingpost l? and to the lamp-circuit [CIO at H, and outof said circuit at G, and thence to the magnet M2 through post F and outat E, to the binding-postN of the dynamo. The armature should now berevolving at the normal speed, and all the lamps will be found to beburning normally. The magnet M2 is not now powerful enough to draw inits core, being counteracted by the spring S', which lifts the bar H outof communication with the contacts g,- hence there is no current passingthrough the coils f or through the dii'erential.

coils D and D. These differential coils, as will be seen, are soconnected as to magnetize the cores in opposition to the main coils M M.The circuit of the dierential coils outside Yof the machine will beunderstood at a glance by referring to the annexed drawings. The in-yner end, a, is connected to the binding-post? of the machine, while theouter end, d, is connected to the bindingpostP of the regulator, andwhen the bar H is drawn down upon the contacts g the current will flowthrough said bar to the post N and back to the bindingpost N of themachine. Thus it will be seen that the differential current is connectedbetween the main circuit of the machine at P and N. When the magnet M issuiiciently energized to draw down the bar H, and thereby establishcommunication with the contacts g, a portion of the current will at onceilow through the coils D D and oppose the action of the main coils M M',and this opposition will bestrongest when all the contacts g are incommunication with the bar'H. Thus all that is necessary in ord'er'tohave a dynamo become automatic in its own regulationto control its forceaccording to the Work' re` quired of it--is, first, to properly adjustthe resistance of the coils D D' with'reg'ardto the main current, and,second, to regulatethetem sion of the spring S in the regulator. Thus itwill be seen that on cutting out one or more lamps the magnet MT will beover excited and draw its core in deeper until the spring S and theattractive power of the magnet will again balance. At the same time thebar H will make communication with one or more 'com tacts g, and thesewill send a corresponding amount of current through the coils D D', thusdiminishing the power of the main coils M M. On cutting out more lampsthe mag` net M2 will continue to operate withincreased force upon thebar H, thus making more contacts and diminishing moreand more, as-thecase may be, the power of the main magnets.

I do not des'ire'vto confine myself to the above modas operandi ofregulating the dow of the currents in the differential magnets-as, forinstance, the main magnets may be wound with two wires running parallelwith each other, so that while the main current is passing through oneof the wires a current may be made to pass in an opposite direction,thus weakening the magnetism of the field-cores, as may be required,without departing from thespirit of my invention.

What I claim as my invention is-,

1 In a dynamo-electric machine, a separate helix supplementary to themain helix of the field-magnet, the separate helix being sov wound andconnected' that the machine working norm'a'ily will not be influencedthereby, but on thecurrent becoming abnormally strong said supplementaryhelix will bebr'ought into action and tend to diminish the magnetism ofthe field-magnet, and automatically regulate the strength thereof to'accommodate the out-l side work, substantially as set forth.

2. The combination, with the field-magnets of a dynamo-electric machine,of tw'o series of opposing helices, one series serving to excite theieldfmagnets and the" other series serving as regulating-helices for`the same, a branch circuit, including the regulating-helices, avariable resistance, also included in thebranch, and means forcontrolling the resistance in the branch, whereby the field-magnets maybe regulated as'- required.

3. In a dynamo-electric' generator, a separate helix' supplementary toand wound differentially upon the cores of the field-magnet and includedin-` a normally-open circuit, also in-` cluding variable-resistancecoils-having a movable contact operated by the moving core of anelectro-magnet located in the main circuit, to successively make orbreak contact with v one or more' ofthe coils of the regulator and toclose or partially' close the diiierential circuit bythe action of thevarying resistance of the main circuit operating upon theelectromagn'e'tand resistance-coils, and thereby demagnctizing to agreater or less extent the field-magnet and automatically regulating theelectro-motive force of the machine, substantially asset forth.

(3H-ARLES J. VAN DEPOELE.

Wtnessesf L TBEG. PLBAILB, Auron' K. STILs'.

ICO

